Bash script for text overlay on graphics images using the ImageMagick package.
Using dialog where installed (see e.g. 'apt info dialog') otherwise prompts for input as follows:
Source: <path to graphics file or directory>
Id Tag: <identification tag for the file>
Coords: <location where created>
Author: <copyright owner>
Target: <path to target directory>
Input parameters are updated to 'ptag.dat' file to be used again. Requires the ImageMagick suite, verify with '$ convert -version'